Question

certain regions is losing 12 million acres if rain forest each year
a)find a linear function f that calculates the change in acres of rain forest in million in x years
b) find f(4) and interpret the results

a) f(x)=
b f(4)=

after ?? years the regions can expect to have lost about ?? million of acres of rain forest

Answer 1

It's saying that the rainforest loses ("changes") 12 million acres/year.

amount_lost or amount_changed = 12 * years

Answer 2

So,

f(years) = 12 * years

Answer 3

so a) f(x)=12 and b) f(4)= 48

Answer 4

so in 48 years they region can lost about 576 million acres

Answer 5

If f(x) = 12

Then how do you get f(4) = 48. Show your calculations. (Hint: you can't.)

Answer 6

12*4

Answer 7

In your equation f(x) = 12, there's no place to put the 4.

Answer 8

ok but the question is saying for part b f(4)

Answer 9

Yep, but for part a the answer is:

f(x) = 12 * x

Answer 10

so 12*12

Answer 11

Nope.

x is the number of years.

f(x) = 12 * x

So

f(4) = 12 * 4
=48

Answer 12

so the answer would be in 48 years the region can expect 576 million acres

Answer 13

why is this math so hard I am dying here, been trying to do this exam for 9 hors now

Answer 14

You're trying to find the number of acres in 4 years, right?

(Not 48?)

Answer 15

Try to keep organized as you think about this.

First figure out what x means -- it's the number of years.

Then figure out what f(x) means -- it's the amount of acres lost (over x years).

Answer 16

that right so it would be 4 so in 4 years they would lose 48 million acres right

Answer 17

Yes.

Answer 18

so this is what my answer would look like

a) f(x)=12
b) f(4)= 48

after 4 years the rain forest lost 48 million acres

Answer 19

a) is actually 12*x

Your answer should be:

a) f(x) =12x
b) f(4) = 48

After 4 years the rain forest lost 48 million acres.